Fig. 1. The globular cluster Terzan 5 (centre) in visible light and the gamma-ray source HESS J1747 – 248. The gamma-ray intensity is displayed in false colours from blue (low) to white (high). The smaller circle (solid) comprises half of the mass of Terzan 5. A zoom on this central region in infrared light is depicted in the upper right inset. The larger circle (dashed) shows to what extension stars are gravitationally bound to the cluster.
Sources: ESO/Digitized Sky Survey 2 and ESO/F. Ferraro (IR)
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